Rectangle cake quantities

[cakeaddict]

I am making a birthday cake that involves baking a sponge in a 33 x 23cm rectangular cake tin. But I can't find any converters anywhere that will tell me how much mixture I need for a tin this size and shape. Does anyone know?

that's roughly an A4size, isn't it?
I can call my cake shop tomorrow to find out, but I would probably just do a 6 egg mix

(6 eggs, 12 oz each self-raising flour, butter/margarine, sugar, 5ml vanilla extract)

do you have the time to do a test run?

Thanks - yes, it's roughly A4.
Unfortunately no time to do a test run - need to make it tomorrow for a party on Saturday.

I'll call my cake shop asap and will let you know what they think.

how many people is it for?
and would it be just an average sponge as I described?

right, the answer is (drum roll):

you need and 8 egg mixture.

so 8 eggs,
16 oz butter or margarine
16 oz caster sugar
16 oz self raising flour
10 ml (2 teaspoons) vanilla extract

I'd add 2 teaspoons of baking powder as well.
I always add some, my cakes come out a good height and very fluffy and moist!

good luck!

Assuming you rectangular tin isn't full round cake (two sandwich tins) deep and they normally aren't 8 eggs is about right.